Add purchase history servlet

src/main/java/io/hardingadonis/miu/controller/web/PurchaseHistoryServlet.java

@@ -0,0 +1,207 @@
+package io.hardingadonis.miu.controller.web;
+
+import io.hardingadonis.miu.model.*;
+import io.hardingadonis.miu.model.detail.OrderStatus;
+import io.hardingadonis.miu.services.*;
+import java.io.*;
+import java.util.*;
+import javax.servlet.*;
+import javax.servlet.annotation.*;
+import javax.servlet.http.*;
+
+@WebServlet(name = "PurchaseHistoryServlet", urlPatterns = {"/purchase-history"})
+public class PurchaseHistoryServlet extends HttpServlet {
+
+    private static final int ORDER_PER_PAGE = 5;
+    private static final int PAGES_PER_GROUP = 3;
+    private static final int MINIMUM_TWO_SIDE = 1;
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response)
+            throws ServletException, IOException {
+        request.setCharacterEncoding("UTF-8");
+        response.setContentType("text/html; charset=UTF-8");
+
+        User user = (User) request.getSession().getAttribute("user");
+        String tab = request.getParameter("tab");
+
+        if ((user == null) || (tab == null)) {
+            response.sendRedirect("login");
+            return;
+        }
+
+        List<Order> orderList = null;
+        int endPage = 0;
+        int page = 0;
+
+        switch (tab) {
+            case "all": {
+                endPage = (int) Math.ceil(Singleton.orderDAO.countByUserID(user.getID()) / (double) ORDER_PER_PAGE);
+                page = parsePage(request, endPage);
+
+                orderList = Singleton.orderDAO.getAllWithUserID(user.getID(), (page - 1) * ORDER_PER_PAGE, ORDER_PER_PAGE);
+                break;
+            }
+
+            case "processing": {
+                endPage = (int) Math.ceil(Singleton.orderDAO.countAllWithUserIDAndStatus(user.getID(), OrderStatus.PROCESSING) / (double) ORDER_PER_PAGE);
+                page = parsePage(request, endPage);
+
+                orderList = Singleton.orderDAO.getAllWithUserIDAndStatus(user.getID(), OrderStatus.PROCESSING, (page - 1) * ORDER_PER_PAGE, ORDER_PER_PAGE);
+                break;
+            }
+
+            case "shipping": {
+                endPage = (int) Math.ceil(Singleton.orderDAO.countAllWithUserIDAndStatus(user.getID(), OrderStatus.SHIPPING) / (double) ORDER_PER_PAGE);
+                page = parsePage(request, endPage);
+
+                orderList = Singleton.orderDAO.getAllWithUserIDAndStatus(user.getID(), OrderStatus.SHIPPING, (page - 1) * ORDER_PER_PAGE, ORDER_PER_PAGE);
+                break;
+            }
+
+            case "done": {
+                endPage = (int) Math.ceil(Singleton.orderDAO.countAllWithUserIDAndStatus(user.getID(), OrderStatus.DONE) / (double) ORDER_PER_PAGE);
+                page = parsePage(request, endPage);
+
+                orderList = Singleton.orderDAO.getAllWithUserIDAndStatus(user.getID(), OrderStatus.DONE, (page - 1) * ORDER_PER_PAGE, ORDER_PER_PAGE);
+                break;
+            }
+
+            case "canceled": {
+                endPage = (int) Math.ceil(Singleton.orderDAO.countAllWithUserIDAndStatus(user.getID(), OrderStatus.CANCELED) / (double) ORDER_PER_PAGE);
+                page = parsePage(request, endPage);
+
+                orderList = Singleton.orderDAO.getAllWithUserIDAndStatus(user.getID(), OrderStatus.CANCELED, (page - 1) * ORDER_PER_PAGE, ORDER_PER_PAGE);
+                break;
+            }
+        }
+
+        String paginationStr = createPagination(tab, page, endPage);
+
+        request.setAttribute("order_list", orderList);
+        request.setAttribute("pagination_str", paginationStr);
+        request.setAttribute("end_page", endPage);
+
+        System.out.println(paginationStr);
+
+        request.getRequestDispatcher("/view/web/purchase-history.jsp").forward(request, response);
+    }
+
+    private static int parsePage(HttpServletRequest request, int endPage) {
+        try {
+            int page = Integer.parseInt(request.getParameter("page"));
+
+            if ((page < 1) || (page > endPage)) {
+                page = 1;
+            }
+
+            return page;
+        } catch (NumberFormatException ex) {
+            return 1;
+        }
+    }
+
+    private static String createPrevBtn(String tab, int page) {
+        StringBuilder prevBtn = new StringBuilder("<a href=\"purchase-history?tab=").append(tab);
+
+        prevBtn.append("&page=").append(page - 1);
+
+        prevBtn.append("\">Trước</a>");
+
+        return prevBtn.toString();
+    }
+
+    private static String createNextBtn(String tab, int page) {
+        StringBuilder nextBtn = new StringBuilder("<a href=\"purchase-history?tab=").append(tab);
+
+        nextBtn.append("&page=").append(page + 1);
+
+        nextBtn.append("\">Sau</a>");
+
+        return nextBtn.toString();
+    }
+
+    private static String createSingleIndex(String tab, int page, int index) {
+        StringBuilder singleIndex = new StringBuilder("<a class=\"");
+
+        singleIndex.append((page == index) ? "page-current" : "");
+        singleIndex.append("\" href=\"");
+
+        singleIndex.append("purchase-history?tab=").append(tab);
+
+        singleIndex.append("&page=").append(index);
+
+        singleIndex.append("\">").append(index).append("</a>");
+
+        return singleIndex.toString();
+    }
+
+    private static String createNormalPagination(String tab, int page, int beginPage, int endPage) {
+        StringBuilder normalPagination = new StringBuilder();
+
+        for (int i = beginPage; i <= endPage; i++) {
+            normalPagination.append(createSingleIndex(tab, page, i));
+        }
+
+        return normalPagination.toString();
+    }
+
+    private static String createNormalPagination(String tab, int page, int endPage) {
+        return createNormalPagination(tab, page, 1, endPage);
+    }
+
+    private static String createManyPagination(String tab, int page, int endPage) {
+        StringBuilder manyPagination = new StringBuilder();
+
+        if (page <= PAGES_PER_GROUP + MINIMUM_TWO_SIDE) {
+            manyPagination.append(createNormalPagination(tab, page, 1, page < 3 ? 3 : page + 1));
+
+            manyPagination.append("<span>...</span>");
+
+            manyPagination.append(createSingleIndex(tab, page, endPage));
+        }
+
+        if ((page > PAGES_PER_GROUP + MINIMUM_TWO_SIDE) && (page <= endPage - PAGES_PER_GROUP - MINIMUM_TWO_SIDE)) {
+            manyPagination.append(createSingleIndex(tab, page, 1));
+            manyPagination.append("<span>...</span>");
+
+            manyPagination.append(createSingleIndex(tab, page, page - 1));
+            manyPagination.append(createSingleIndex(tab, page, page));
+            manyPagination.append(createSingleIndex(tab, page, page + 1));
+
+            manyPagination.append("<span>...</span>");
+            manyPagination.append(createSingleIndex(tab, page, endPage));
+        }
+
+        if (page > endPage - PAGES_PER_GROUP - MINIMUM_TWO_SIDE) {
+            manyPagination.append(createSingleIndex(tab, page, 1));
+
+            manyPagination.append("<span>...</span>");
+
+            manyPagination.append(createNormalPagination(tab, page, page - 1, endPage));
+
+        }
+
+        return manyPagination.toString();
+    }
+
+    private static String createPagination(String tab, int page, int endPage) {
+        StringBuilder pagination = new StringBuilder();
+
+        if (page != 1) {
+            pagination.append(createPrevBtn(tab, page));
+        }
+
+        if (endPage < PAGES_PER_GROUP + (MINIMUM_TWO_SIDE + 1) * 2) {
+            pagination.append(createNormalPagination(tab, page, endPage));
+        } else {
+            pagination.append(createManyPagination(tab, page, endPage));
+        }
+
+        if (page != endPage) {
+            pagination.append(createNextBtn(tab, page));
+        }
+
+        return pagination.toString();
+    }
+}